MAGNETIC CIRCULAR-DICHROISM OBSERVED BY PHOTOEMISSION ON THE 2P LINESOF IRON FILMS UNDER AN APPLIED-FIELD

Circular dichroic x-ray photoemission spectroscopy (CDXPS) experiments have been performed on the 2p core-level spectra of polycrystalline F e films deposited directly on a Ni3Fe (mu-metal) substrate that was ma gnetized by a low excitation field. Because of the polycrystalline sta te of the iron films, CDXPS studies in the remanent mode were not poss ible, thus the experiments were performed with the magnetic field swit ched on during the experiment. Our work on this polycrystalline iron g ives some insight into the understanding of the magnetic circular dich roism mechanism. The results show a similar angular variation for the measured asymmetry, as observed on an Fe bcc (100) single crystal rema nently magnetized in the (100) direction.